Is the outermost of the world. The thickness of this layer is about 5-6 kilometers, compared to some other class, but the most important, because the living creatures had this class and as part of the ground that is used in the cultivation of water resources which is essential to humans as a source of oil, minerals, and Ta.Coal gas, which is used as fuel. The upper crust is basically a continent mainly composed of granite, aluminium and potassium silicate to the most. Al stone called Sai. The bottom crust is the part most gupp is basalt, which contains magnesium and calcium silicate to steel the majority called the rock surface temperature of the globe saima about 12 to 20 c, which approved the changes according to the season. Part of the ground floor consists of a continent and saima Al Sai. Make more than the thickness of the part under the ocean floor, which contains only the saima.
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